Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bidirectional loading performance of gusset plates in buckling restrained braced frames
Highlights Gusset plates are commonly designed to resist only forces applied by braces and the demand due to out-of-plane frame drifts is usually ignored. Experimental test are conducted on buckling restrained braced frames under bidirectional loading. A parametric study using finite element analysis is conducted based on the configuration of the tested frame. A reduction on the buckling strength of gusset plates is observed in both experimental test and parametric study. Result are compared with commonly used design method for gusset plates.
Abstract A study is conducted to evaluate the performance of gusset plates (GPs) in buckling restrained braced frames (BRBFs) subjected to bidirectional loading. It involves an experimental test, a parametric numerical study and a comparison with Thornton, AISC, Takeuchi’s and Notional Load Yield Line (NLYL) methods. The experimental test was conducted on a one-storey BRBF with pinned beam connections under both unidirectional and bidirectional cyclic loading. It was found that bidirectional loading decreases the GP axial strength by up to 18%, but there is no clear correlation with GP thickness. The parametric study indicated that greater out-of-plane (OOP) drifts reduce the GP axial strength. The methods evaluated with respect to the parametric study generally provided conservative strength predictions. The AISC method with an effective length factor of 2.0, which does not explicitly account for out-of-plane loading, was the most conservative among all methods. The strength predicted ranged from 69% to 92% of the actual strength. Similarly, both Takeuchi’s and NLYL method under bidirectional loading are conservative when the GPs have a rotational stiffness within the likely range of practical applications. However, they are non-conservative for BRBF GPs with a very low rotational stiffness. The NLYL method is less conservative than Takeuchi’s method. The NLYL method is always conservative for the limited range of CBF GP configurations investigated.
Bidirectional loading performance of gusset plates in buckling restrained braced frames
Highlights Gusset plates are commonly designed to resist only forces applied by braces and the demand due to out-of-plane frame drifts is usually ignored. Experimental test are conducted on buckling restrained braced frames under bidirectional loading. A parametric study using finite element analysis is conducted based on the configuration of the tested frame. A reduction on the buckling strength of gusset plates is observed in both experimental test and parametric study. Result are compared with commonly used design method for gusset plates.
Abstract A study is conducted to evaluate the performance of gusset plates (GPs) in buckling restrained braced frames (BRBFs) subjected to bidirectional loading. It involves an experimental test, a parametric numerical study and a comparison with Thornton, AISC, Takeuchi’s and Notional Load Yield Line (NLYL) methods. The experimental test was conducted on a one-storey BRBF with pinned beam connections under both unidirectional and bidirectional cyclic loading. It was found that bidirectional loading decreases the GP axial strength by up to 18%, but there is no clear correlation with GP thickness. The parametric study indicated that greater out-of-plane (OOP) drifts reduce the GP axial strength. The methods evaluated with respect to the parametric study generally provided conservative strength predictions. The AISC method with an effective length factor of 2.0, which does not explicitly account for out-of-plane loading, was the most conservative among all methods. The strength predicted ranged from 69% to 92% of the actual strength. Similarly, both Takeuchi’s and NLYL method under bidirectional loading are conservative when the GPs have a rotational stiffness within the likely range of practical applications. However, they are non-conservative for BRBF GPs with a very low rotational stiffness. The NLYL method is less conservative than Takeuchi’s method. The NLYL method is always conservative for the limited range of CBF GP configurations investigated.
Bidirectional loading performance of gusset plates in buckling restrained braced frames
Vazquez-Colunga, Saul Y. (Autor:in) / Lee, Chin-Long (Autor:in) / MacRae, Gregory A. (Autor:in)
Engineering Structures ; 242
07.05.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bidirectional Loading Behavior of Buckling-Restrained Braced Frames
| British Library Conference Proceedings | 2010